Designed to increase installation speed of popular fiber cement panels while meeting manufacturer's specifications. - Fits several siding nailers with concentric safety noses. - Provides the correct nail placement consistently while reducing reliance on acute eye-to-hand coordination. - Allows variability in gun angle while still landing in the “best practices” fastener zone. - Spring loaded pin allows normal use of the nailer. - Anodized finish - Hex key included - Stainless steel set screws. *** Note: While other nail guns/nailers may be compatible, listed above are the only ones known to fit *** Check WellsDesignToolco.com if new siding nailers have been added.